Just fitted a Conti Classic Attack 100/90 - 19 on the front, and what an eye opening wrestle this was. The Roadriders I have used in the past push on nearly all the way by hand with levers to lift over the last part of the bead. I used chalk as a lubricant and this has been fine for the Avons, but was not up to the job for the radial. Anyone suggest a tyre paste / lube that is not too quick drying, as I think this will make things easier. Interestingly the Conti Tech guys say the tyre will fit WM2 and it does, but it does not allow the tyre to fully achieve the full 100 width, with it being closer to 90/90-19 looking in width. However, after nearly taking out a traffic island bollard and having to sit the bike up a little to avoid the verge - It turns in like a pushbike and is very precise and light to steer.